Fume-condenser.



T. B. STEWART.

FUME CONDENSER.

APPLICATIONHLED NOV. 30. 1914.

1,237,571. PatentedAug..2l,1917.

' 16 -2SHEETSSHEETI.

Fig.1.;

- T'. B. STEWART. T

FUME CONDENSER.

APPLICATION FILED NOV- 30, 1914- 2 SHEETS-SHEET 2.

' 1 ,2 37, 57 1 I Patented Aug. 21", 1917.

AN @FNQE THOMAS B. STEWART, 0F PORTOLA, CALIFORNIA.

FUME-CONDENSER.

Application filed November 30, 1914. Serial No. 874,863.

To all whom it may concern:

Be it known that I, THoiuAs B. STEWART, a citizen of the United States,residing at Portola, in the county of Pulmas-and State of California,have invented certain new and useful Improvements in Fume-Condensers, ofwhich the following is a specification.

This invention relates to an apparatus for condensing smoke and theheated products arising from chimneys and more particularly relates to afume condensing apparatus as especially applicable to smelters.

It is accordingly a principal object of this invention to provide aneffective apparatus for suppressing by condensation the deleteriousgases given off in the fumes or smoke arising from smelters and likefurnaces.

It is also an object of this invention to provide means, which incondensing the undesirable oractually poisonous fumes will abstract-therefrom all the metalliferous solids or values resulting from suchcondensation.

It is an object of equal importance of this invention to provide .meanswhich shall force the smoke carrying the fumes and the undepositedmetallic particles against and around a series of novel baflie platessurrounded by a liquid, the latter of which serves to condense the smokewhile the bafile plates arrest the progress of the solids.

The above and additional objects which will become apparent as thisexplanatory description proceeds, are accomplished by such means as areillustrated in the accompanying drawings, described in the followingspecification and then more particularly pointed out in the claims whichare appended hereto and form a part of this application.

With referenceto the drawings, wherein there is illustrated thepreferred embodiment of this invention as it is reduced to practice, andthroughout the several views of which lil e characters of referencedesignate similar=parts:

Figure 1 is an elevational view of the apparatus comprehended by thisinvention positioned over the stack of a smelter, a vertical sectionbeing taken through a portion of the View,

Fig. 2 is a plan view of the lowermost bafiie plate,

Fig. 3 is a similar view of the uppermost baffle plate,

Fig. 4 is a plan view of the intermediate baflle plate, and

Fig. 5 is a sectional view taken on the line 5-5- of Fig. 4. I

With reference to the drawings, the numeral 10 designates thecontinuation of the smoke stack of a smelter 1'1, roast furnace or thelike, such stack extending upwardly into the oppositely disposedcylindrical recess 12 formed by the inner walls 18 of an upper cap ordeflector member 1%, preferably formed with spaced double cylindricalwalls, namely the inner wall 13 and the outer concentric wall 13, saidwalls being connected; together at the bottom by an annular wall 16. Aplate 16 is secured to the outer wall 13 at the top of the cap ordeflector for closing the same, while the wall 13 terminates below theplate 16 with a hemispherical top, the inner surface of whichimmediately above the top of the stack 10 is of arcuate formation, asshown at 15, t0 defiect the smoke issuing from the stack and cause itsdownward dispersion through the recess 12 in an equal manner radially.from the stack.

Surrounding the stack and the upper portion of the smelter 11 there isto be arrange a suitable supporting framework for this braces 18 andabove the blast fans 19 is the reservoir 22 which surrounds the lowerportion of the deflector 14 and which is formed with the upwardlyextending hollow cylindrical stem 23 which surrounds the intermediateporti'on of the stack 10. Along the upper edge of this reservoir arepositioned suitable overflow pipes 24' while similarlyarranged in thebottom are the emptying pipes 25 of such service in the operation ofthis apparatus as will be presently set forth. This reservoir is adaptedto be filled and maintained at anapproximately constant level by meansof inlet pipes 26 which are 22. These baflie plates are arranged in astepped or staggered relation. illustrated in Fig. land are denoted bythe numeralsiS, 29 and 30 respectively in Figs. 2, 4 and 8. Each of,these plates is formed from a suitable metallic material such as sheetiron which may also preferably enter into the construction of theremainder of the apparatus, and are preferably circular having securedthereto the radial baffles 31, each of which-is L-shaped as indicated inFig. 5 and secured by rivets or some other suitable means 32. The baffleplate 28-is formed with a centralaperture 33 of such size as to spanfhelower open mouth of the recess 12 permitting the smoke deflecteddownwardly along the walls of this recess to enter the lower portion 34.of he reservoir 22, this baffle plate also being provided with one ormore series of circumferentially alined apertures 35 adjacent thecentral aperture 33 in order to accommodate the necessary securing meanswhereby this baffle plate may be supported. along the connecting wall 16of the upper smoke deflector.

The intermediate and upper baflie plates 29 and 30, shown in Fig. l, aresimilarly formed but provided with central apertures 36 and 37 ofvarying diameters, the former being sufliciently large as to space theinner edge of this aperture from the outer wall 13* 'of the deflectorcap 14 while the latter namedaperture is of such size as to closelyembrace this deflector l4 and be secured to its outer wall 13. The outerperiphery of the plate 30 is spaced from the inner Wall of the reservoir22 to which the intermediate baflle v plate 36 is attached in such amanner as to provide a zigzag or tortuous path of progress through theliquid in 'the reservoir 22 for the smoke fumes pressed onwardby blastsfrom the fan casings 1$). Integral straps 38 are provided at spacedintervals around the outer edge of the intermediate battle and the inneredge of the uppermost baflie and are ape-rtured to receive suitablesecuring means whereby these plates may be respectively secured to theinner wall of the reservoir and the outer wall of the 'recesseddeflector body 14.

From the foregoing, it should be readily apparent that the operation ofthe apparatus herein disclosed is in the manner described in thefollowing.

Driving means such as belts 39 lead to a suitable source of power forthe rotation of the fans (not shown upon the drawing but obviouslycontained within the fan casings 19) whereby a positive driving force isfurnished for the upward traveling smoke from the smelter 11 through thestack 10 from which it is conducted through the liquid of travel oversuch bat'flers during the forced upward progress of the condensingfumes. j When it is desired to empty the reservoir 22' from its liquidwhich must in time become impregnated with the poisonous gases and soneed freshening, the outlet pipes 25 are made use of, while the pipes 24normally.

take care of any overflow which may be caused by too great an influx offresh water from the inlets 26. In order to divert the course of thesmoke from the smelter 11- so as not to permit its passage through theres- I ervoir 22 when such emptying process is in progress, a bypassoutlet for the smoke is provided below the fans 19 as indicated by thenumeral 10, the smoke being diverted into this channel by the operationof a hinged damper 11 adapted to be operated to effectually block offthe passage of the smoke through the upper portion of the stack. Itwillbe understood that, owing to the condensing'reservoir22 being spacedfrom the stack 10, condensation of the smoke while within said stack 10will be prevented.

While in the foregoing however, there has thus been illustrated in thedrawings and described in the specification such combination andarrangement of elements as constitute the preferred embodiment-of thisin vention, it is desired to emphasize the fact that such minor changesin the matters of proportion and degree may be madein later adaptationsof this device as shall not alter the spirit of the invention as definedin the appended claims.

WVhat is claimed is 1. A fume condenser comprising a liquid reservoir, aplurality of alternating battle plates in close parallel relation withinsaid reservoir and adapted to be cover-ed by liquid therein, radiatingbafliers secured to one face of each baflie plate, and means fordirecting fumes from a furnace centrally beneath the lowermost baffleplate and final escape, after passing said baflie plates, from the topof the reservoir.

2. A fume condenser comprising a liq 'ui'd reservoir, a plurality ofparallelbaflie plates within saidreservoir and adapted to be covered bythe liquid therein, said battle plates being in spaced and staggeredrelation, and radiating bafflers secured to the upper face of eachbatfle plate, and means for directing fumes from a furnace centrallyplaced over the open end of said smoke stack and opening at its lowerend into said liquid reservoir, and a plurality of baflle platessubmerged therein between, the peripheral wall thereof and thedeflector.

4. A fume condenser comprising a liquid reservoir having a centraltubular extension, a smoke stack passing through said tubular extensionin spaced relation therewith and terminating above the reservoir, acylindrical deflector overlying the upper open end of said smoke stackand having its lower open end extending into the reservoir and adaptedto be coveredby the liquid therein, a p1u-' rality of baflle plates inthe reservoir between the walls thereof and the deflector alternatelyconnected to said parts, and radiating bafllers secured to the upperface of each baflle plate.

5. Ajume condenser comprising a smoke stack, a liquid holding reservoirsurrounding said stack and out of contact therewith,

and a deflector cap positioned over the top.

of said stack and extending, downwardly with the lower open endp'rogecting into the reservoir and adapted to be continuously covered bythe liquid therein.

6. A fume condenser comprising the combination with a smoke stack, of aliquid hold ing reservoir surrounding and spaced from said stack, acylindrical deflector positioned over the top of said stack and openingat its lowerend into said reservoir, and bafiie plates in said reservoirat the bottom of said deflector in stepped relation and alternatelysecured to said deflector and to said reservoir.

7 A fume condenser comprising in combination with a smoke stack, of aliquid-holding reservoir surrounding and spaced from said stack, acylindrical deflector opening at its lower end into said reservoir toconduct the smoke of the stack thereinto, baflie plates in closerelation surrounding the lower end of the deflector and adapted to becovered by a liquid in said reservoir to distribute the smoke throughsaid liquid, emptying means for said reservoir, and a liquid supply pipeadapted to be supported above the reservoir by said deflector.

8. A fume condenser comprising the combination with a smoke stack, of areservoir surrounding and spaced from said stack and adapted to hold aliquid at 'constant height therein, means for deflecting the smoke fromsaid stack into the liquid within said reservoir to condense the smoke,parallel baflle plates arranged to be covered by the liquid in thereservoir and alternately-spaced from the reservoir wall and from thedeflector, and means formaintaining a constant supply of liquid in saidreservoir.

9. A fume condenser comprising the-combination with a smoke stack, of areservoir adapted to hold a liquid surrounding said stack and spacedtherefrom to prevent con densation of the smoke while within the stack,and deflecting means over the outlet end of said stack inserted at itslower end in said reservoir to direct the smoke and gases passingthrough said smoke pipe into the reservoir and effect the condensationof volatilized solid matters in said smoke.

10. A fume condenser comprising the C0111- bination with a smoke stack,of a condensing liquid holding reservoir surrounding said" stack andspaced therefrom to prevent condensation of smoke while within saidstack, a deflector to direct the smoke and fumes emerging from saidstackinto said reservoir, and means for effecting the condensation ofsmoke within said reservoir, said means including centrally aperturedbaflie plates in close parallel arrangement alternately secured to saidreservoir and to the deflector to provide a tortuous passage-way for thesmoke.

11. A fume condenser comprising the combination witha smoke stack, of areservoir surrounding said stack but spaced therefrom, means formaintaining liquid at. a constant height in said reservoir, a deflectorpositioned over the mouth of said stack to direct the smoke downwardlyand positively into the liquid in said reservoir, centrally aperturedbafiie plates surrounding said deflector, means for alternately securingsaid baffle plates to the outer Wall of the reservoir and to saiddeflector, and radial bafliers secured on one side of each baifle plateto ar rest and cause the deposition of metalliferous particles carriedby Sitld'flfilOkG and condensed in the reservoir,

12. A fume condenser comprising the con1- bination with a smoke stack,of a liquid holding reservoir surroundiugthe same and having anupstanding central tubular portion spaced from and .inclosing said smokestack. a double shell deflector cap positioned over the upper end of thesmoke stack and dc- 5 pending into said reservoir, a lower ballie platesecured upon the bottom of said deflector cap spaced from the outer sideof said reservoi r and having a central opening to cri'nit the passageof snioke-undcr-w:'..1a plate, an in termediate bafiie plate secured atits outer pecap to deliver Water upon said upper bame riphery to ,theWall of the reservoir and plate. having a central opening s acingit'from the In testimony whereof Iaifix my signature deflector cap, anupper ba e plate surroundin presence of two Witnesses.

5 ing and being secured to the outer shell of THOMAS B. STEWART. saiddeflector cap and spaced from the Witnesses: outer Wall of thereservoir, and a liquid sup- F. R. YOUNG, ply pipe supported on the topof the-deflector ULDENE LONG.

copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents Washington, D. 6.

